The device provides the maximum acceleration of the car in these traffic conditions. As soon as the effort to a pedal of an accelerator exceeds a certain threshold value, depending on the frequency of rotation and speed of the movement, there is a switching to one of more lowest transfers. Switching to the following highest transfer, will follow only at achievement of the most admissible value of frequency of rotation of a bent shaft of the engine.

PREVENTION

On the slippery road compulsory anticipatory switching to the lowest transfer can cause pro-slipping of driving wheels.